Thu·May 8, 2025Thursday·May 8, 2025

1. 01*

   Jet Quenching in Heavy-Ion Collisions at RHIC and the LHC experiments

   Nihar Ranjan Sahoo🇮🇳

   Jet quenching serves as a key probes of the Quark-Gluon Plasma (QGP) in heavy-ion collisions. This proceedings presents recent results from RHIC and LHC on jet energy loss, acoplanarity, and the flavour and path-length dependence of Parton energy loss, providing critical constraints on QGP properties and theoretical models. Upcoming data taking campaigns at RHIC and the LHC will offer enhanced precision and extended kinematic reach to further advance our understanding of jet-medium interactions.

   nucl-exhep-exhep-phJ.Subatomic Part.Cosmol.(2026)·1 citation
2. 02*

   Orders-of-magnitude improvement in precision spectroscopy of an inner-shell orbital clock transition in neutral ytterbium

   Taiki Ishiyama🇯🇵 · Koki Ono🇯🇵 · Hokuto Kawase🇯🇵 · Tetsushi Takano🇯🇵 · Reiji Asano🇯🇵 · Ayaki Sunaga🇭🇺 · Yasuhiro Yamamoto🇹🇼 · Minoru Tanaka🇯🇵 · Yoshiro Takahashi🇯🇵

   An inner-shell orbital clock transition ${}^1{S}_0\leftrightarrow 4f^{13}5d6s^2(J=2)$ in neutral ytterbium atoms has attracted much attention as a new optical frequency standard as well as a highly sensitive probe for several new physics phenomena, such as ultralight dark matter, violation of local Lorentz invariance, and a new Yukawa potential between electrons and neutrons. Here, we demonstrate almost two-orders-of-magnitude improvement in precision spectroscopy over the previous reports on this transition, achieved by trapping atoms in a three-dimensional magic-wavelength optical lattice. In particular, we successfully observe the coherent Rabi oscillation, the relaxation dynamics of the excited state and the interorbital Feshbach resonance. To highlight the high precision of our spectroscopy, we carry out precise isotope shift measurements between five stable bosonic isotopes well below 10 Hz uncertainties, successfully setting bounds for a hypothetical boson mediating a force between electrons and neutrons. These results open up the way for various new physics search experiments and a wide range of applications to quantum science with this clock transition.

   ↳ physics.atom-phhep-exhep-phnucl-exNature Photon.(2026)·4 citations
3. 03*

   Heisenberg Uncertainty Inequality and Breaking of Isospin Symmetry in Atomic Nuclei

   Sandro Stringari🇮🇹

   The Heisenberg uncertainty inequality is used to derive a rigorous lower bound to the amount of isospin impurities in $N=Z$ atomic nuclei, caused by the violation of isospin symmetry. The bound is fixed by the difference between the neutron and proton radii and the sum of the charge exchange monopole strengths. It can be used to check the consistency of advanced many-body calculations accounting for the breaking of isospin symmetry. The uncertainty inequality is also employed to derive an upper bound to the isovector dipole moment in terms of the amount of isospin impurities, providing an insightful connection between the violation of parity and isospin symmetries.

   ↳ nucl-thhep-exhep-thnucl-exPRResearch(2025)·0 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.